Grate-operating apparatus.



H. DIKBMAN.

@RATE OPERATING APPARATUS.

APPLICATION FILED APR.13,1914.

THE ORRIS PETERS COI. PHOTO-LITHO., WASHINGTON. D4 C,

unrrnn sfrafrns PATENT orricE.

HARVEY DIKEMAN, OF DANBURY, CONNECTICUT.

GRATE-OPERLATING APPARATUS.

To all whom t may concern:

Be it known that l, HARvnY DIKEMAN, citizen of the United States,residing at Danbury, in the county of Fairfield and State ofConnecticut, have invented certain new and useful mprovements inGrate-Operating Apparatus, of which the following is a specification.

lThis invention relates to improvement in the apparatus for actuatingfire grates, and may be applied without material structural change tothe grat-es of cooking stoves, ranges, furnaces, steam and other'generators, and the like, and has for one of its objects to improve theconstruction and to render the operation more certain and increase theefficiency and utility of devices of this character.

lVvrith these and other objects in view the invention consists incertain novel features of construction as hereinafter shown anddescribed and then specifically pointed out in the claims.

The improved device is designed more particularly for use in connectionwith cooking stoves and ranges, and for the purpose of illustration isshown applied to the rebox and grate portion of a conventional cookingrange, and in the drawings thus employed-Figure 1 is an end elevation ofthe lire-box portion of a cooking range with the improved grateactuating mechanism applied. Fig. 2 is a plan view with the fire-boxportion in section on the line 2-2 of Fig. 1. Fig. 3 is a section on theline 3 3 of Fig. 2. Fig, 4 is a detached perspective view of thecoupling bar.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters.

The fire-box portion of the range is indicated as a whole at 10 andincludes bearings 11 for the trunnions 13-14 of the grate members, thelatter being designated conventionally at 15-16. Any required number ofthe grate sections may be employed and it is not desired therefore tolimit the invention in this respect, but for the purpose of illustrationtwo of the sections arranged to be rocked upon their trunnions areshown. The grate bars are shown in the usual form, but any requiredarrangement of the bars may be employed. The trunnions 155-14 at one endare extended and formed with Specification of Letters Patent.

Patented oct. 6, 1914.

Application filed April 13, 1914. Serial No. 831,661.

squared terminals 17-18 externally of the side wall of the range.Mounted upon the terminal 17 of the trunnion 18 is an arm 19, while asimilar arm 20 is mounted upon the terminal 18 of the trunnion 111. Thearms 1.9*20 extend above and below the terminals 17-18 and are connectedrespectively at their upper and lower ends by links 21'-22, the linksbeing pivoted to the arms as shown. The links 21-22 are coupledintermediate their ends by a bar 23 which is pivoted to the links at24-25. |The bar 23 is provided with a socket 26 to receive one end 27 ofan operating handle 28, the portions 27-28 being preferably formed atright angles to each other as represented in Fig. 2. By this simplearrangement it will be obvious that by coupling the handle member to thesocket and moving the handle back and forth simultaneous oscillatingmotion will be imparted to the coupled grates, and with equal forceabove and below the trunnions, so that no danger exists of unequalstrains being applied to the grates. By this arrangement also it will beobvious, that no danger exists of one grate section being moved fasteror to a greater extent than the other, but all the grate sections willbe simultaneously actuated and in perfect harmony and at uniform speedand each section likewise moved to exactly the same extent. Thus, nodanger exists of one or more of the grate sections being overturned orbecoming otherwise displaced.

By arranging the terminals 17-18 of the trunnions intermediate the arms19-20 and applying the locking force to the arms at equal distances fromtheir pivotal points, the leverage or the force will be correspondinglyuniformly applied to the grate bars andl all tendency to unequal strainsobviate The improved device is simple in construction, can beinexpensively manufactured and applied without material structuralchange to the various forms of rolling grate sections in common use.

Having thus described the invention, what is claimed as new is:

1. The combination with a grate device including a plurality of rockingunits, of arms connected intermediate their ends respectively to saidunits, links pivotally connected to said arms at equal distances fromthe grate unit connections thereof, a member pivotally connected to saidlinks, and means ior imparting movement to said link connecting member.

2. The combination with a grate device including aV plurality ot'rocking units, of arms connected intermediate their ends respectively tosaid units7 links pirotally connected to said arms at equal distancesfrom the grate unit connections thereof, and means for impartingreciprocating movement to said links.

The combination With a grate device including a plurality of rockingunits, oi' arms connected intern'iediate their ends respectively to saidunits, links pivotally connected to said arms at equal distances fromthe grate unit connections, a member pivotally connected to said linksand having a socket, and an operating member engaging said socket.

l. The combination With a grate device including plurality of rocking`units, of arms connected intermediate their ends respectively to saidunits7 links pivotally connected to said arms above and below said grateconnections, and means for imparting reciprocating movement to seid armsand their link connections.

ln testimony whereof I affix my signature in presence of two witnesses.

HARVEY DIKEMAN. [Le] lVitnesses ROBERT G. DninMAN, MARY B. CULI-Linn.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

